Steam-boiler.



A. 0.1. HENNIG.

STEAM BOILEH.

APPLICATION FILED MAY l2, 191]. 1,996,799. ,Pa-sented Mar. 11,1919.

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STEAM BOI'LER.

APPLICATION man MAY12, |917.

1,2963 99. Patented Mar. 11,1919-` 3 SHEETS-SHEET 2.

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A TTURNEY A. (3.1. HENNIG.

'STEAM BOILER. APPLICTION'FILED MAY l2, 19H.

Patented Mar. 11, 1919.

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/lvf/E/l/of? '.da 6.2/ /e/P/y/ I M/M/ Arron/vir ADOLPH J'. HENNIG, 0FSEATTLE, VVASEIIINGTON.V

STEAM-Berlina.'

specification of Letters Patent. Patented Mar. 11, 1919.

Application filed May 12, 1917. `Serial No. 168,326.

To all 'whom it may concern.'

Be it known that I, ADOLPH'G. J. HEN- NIG, a citizen of the UnitedStates, residing at Seattle, in the county of King yand State ofWashington, have invented certain new and vuseful Improvements in Steam-Boilers, of which the following isa specification. i

This invention relates to steam boilers of the water-tube type; and themain object of my improvements is to enable a comparatively small boilerof this class to produce a larger quantity of high pressure steam moreeconomically and rapidlyv thanhith.-

erto.

A; further and important object is tov provide controlling devices whichcontributeto the boiler efficiency by regulating the pressures and foreffecting a positive circulation of the water and steam within theboiler.

Still another object is to improve the details of the boiler structureso that the same are capable of freely expanding'. and contracting andarranged to be quickly and conveniently replaced when necessary.

The preferred form of construction is illustrated in the accompanyingdrawings,

wherein Figure 1 is a front elevation of the boiler; Fig. 2 is a rearelevation and Figs. 3 and 4 are elevations from opposite sides, thecasing in said views being shown in section; Fig. 5 is a frontelevation, to anwenlarged scale, of a'union for coupling adjacent coilelements of the boiler; and'Fig. 6 is a sectional view taken through 6 6of Fig. 5. v

The reference numeral 10 designates the boiler casing which may beconstructed of sheet metal plates with an internalflinin'gY 11 of asuitable heat insulating material. The boiler proper is provided atopposite sides with longitudinally disposed mud drums or watercontaining members 12 and 121 provided with valved blow-off pipes, suchas 13. Opening into and extending upwardly from said members are tubularheaders 14, 141, 142, etc. Clamfped to the headers at the front andYrear of the boiler are attachments 15, 151 and 152 disposed at dierentelevations to support the rack pipes which, in turn, support the variousbanks of steamgenerating and superheating pipe coils. Said rack pipescomprise transversely arranged horizontal pipes 16, 161 and 162 whichare connected by longitudinal and vertical -pipes 162 and 164, as shown.

The feedV water for the boiler is supplied from one side into a rackpipe 16, as indicated by feathered arrow 'in Fig. 1, and after'beingheated while passing through the above named pipes is led by a pipe 165into the lower' end cfa manifold 17 located near the front and-top ofthe boiler. This manifold is provided'with side outlets for connections171 and 172 with the upper coils 19 and 20 of the steam generatorsystem, and from which thewater passes thro-ugh connections 211 and 212into a second manifold 21` at the opposite side of the boiler.

- The water, together with any steam which may Ibe so far produced,descends in the manifold 21, thence by connections 213 and 211 intocoils 22 and 23, and from the latter by connections 241 and 242 into athird manifold 24 located subjacent lto the manifold 17.

- From'the latter the steam and water are conducted by pipes 25 into theheaders 142. The water and steam thus delivered into the headersseparate to have the former mingle with the vbody of water within theheaders which isnormally maintained to approximately the level indicatedby W L in Fig. 3. From near the lower ends of the headers 141are-branches 27 of a draw-oif pipe 271 which -leads to a power-drivenforce-pump, denoted by 28, provided with a delivery pipe 29 which isconnected to a manifold 30. The water thus supplied to manifold 30 iswithdrawn through thev inlet connections 31 of a series of generatingcoils 32 having outlet connections 33 with a manifold 34 in which itdescends and is led therefrom by connections 35 into generating kcoils36.

Through the oliice of said pump the water and steam within the coils 364are subjected to a relativelyhigh vpressure as, for example, 450 pounds,and in such condition the two fluids are conveyed by pipes 37 intodistributingpipes 37.1 and thence into the steam spaces obtaining in theupper ends of the aforesaid headers.

From a higher elevation than said distributing pipes the headers areconnected by steam draw-off pipes 38 to a pressure reducing valve,indicated by 39, which is regulated to deliver the steam into the outletpipe 40 at a pressure considerably lower, say per cent., than thepressure prevailing in the above explained steam generating coils.

The pipe 40 conducts the steam into a manifold 41, whence it is led byconnections 42 into coils 43 which in the present invention, serve inlieu of a steam drum, andby being located immediately above the furnacespace 44, as shown, likewise serveas superheating members. In passingthrough such superheater coils the steam is subjected to Ya hightemperature to render it relatively hot and dry. From the superheatercoils the steam is conducted by connections 45 to a manifold 46wherefrom it is discharged by a pipe47 to be'utilized for `power'orother purposes.l Y

Each of the steam generating and superheater coils comprises pipe unitsof substantially U shapes, being bent as at 48 (Fig. 6) at the rear toaord two forwardly extending members 481 and 482 which terminate inscrew-threaded ends 483. For coupling such ends of the adjacent units Iprovide a union fitting consisting of two complementary cap pieces 49each having a screw-threaded socket at one end into which the endet-83of a pipe member is engaged, and with ground interfitting wing elements491 which furnish communicative connection between a pair of cap pieces.Y Y

These piecesare further formed to taper toward their outer ends toreceive a sleeve 50 which, by being forced inwardly through the ofhcesof nuts 5lV engaging screw-threaded projections 492 of the respectivecap pieces, serve to hold the joint between the wing elements tightlytogether.

In operation, the water is primarily warmed in the heating pipes whichalso serve 'as a rack for supporting the boiler coils and delivered tothe upper steam generating coils, and thence into the headers atopposite sides of the boiler. From the lower ends of the headers thewater is conducted to a pump and is forced thereby through a second andlower series of steam generating coils to be returned to the headers inthe nature of steam. y Y

' The` steam is thereupon conducted by pipes to the sup rheater coilswhich are located between the furnace space and the lower generatingcoils, said steam being supplied to the superheater coils by means'of aregulating valve at a lowery pressure than at which it is maintained inthe generating coils and headers. Y

By introducing a pump between the steam generating coils,thecirculationwithin the boiler is such as to not only cause the heatedwater and steam to take a general downward course, but it alsomechanically compresses the fluids with a corresponding' increase intemperature. The regulating valve maybe of any suitable type which willallow the flow of steam thereby when'the pressure at the delivery sidefalls below the predetermined degree to which the valve is adjusted tooperate; hence the steam in the superheater is maintained at asubstantially uniform pressure and thereis a reserve of steam at arelatively high temperature and pressure which maybe drawn upon tocompensate for an abnormal de- Y mand.

1. In a steam boiler, the combination with' the upright steam and watercontainitng headers, and a feed water pipe connected therewith, ofseries of superposed steam generating coils connected with the headersat different elevations, a pump yfor effecting the flow of water andsteam'produced in said coils downwardly through all of said 'coils' andreturning the fluids into the; steam spaces provided in the upper endsof the headers, and a series of coils connected-with the upper ends ofsaid headers and disposed below thev aforesaid coil-s for superheatingVthe steam subsequent to its delivery thereto from the headers.

2. In a steam boiler, the combination withV the mud drums and headersextending upwardly therefrom at opposite sides of the boiler, and apump, of steam generating coils communicatively connected with eachother through the medium of the headers in proximity to the upper andlower ven ds of the latter, whereby said pump will serve to effect thecirculationof water and steam in said headers and the steam generatingcoils and whereby such fluids are caused to flowl from the lower ends ofcertain of said headers into the upper of the steam generating coils andreturn the water and steam into the upper ends of all of the headersfrom the lower of the coils.

v3. In a steam boiler, the combination with steam and water-containingheaders, waterheating pipes connected thereto, and groups of steamgenerating coils connected with said headers at different elevations, ofa pump arranged to effect the flow of water from the lower ends vofheaders and thence progressivelyidownward through said groups of coilsVand return the water and the produced steam intothe upper ends of saidheaders, a second series of coils, communicative connections betweensaid series ofcoils and the upper ends of said headers, and

pressure-reducing means included in the of steam generating coilsconnected with said headers at diii'erent elevations, of a pump,connections between said groups of coils and arranged to enablersaidpump to effect the iiow of water from the lower ends of said headers andthence progressively downward through said groups of coils and returnthe water and the produced steam into the upper ends of said headers, asecond series of coils positioned below said steam generating coils,connections between said series of coils and theJ upper ends of theheaders, and pressure-reducing means included in the connection betweensaid headers and the said series of coils.

Signed at Seattle, Washington, this 19th day of April 1917.

ADOLPH C. J. HENNIG.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of yatents, Washington, D. C.

